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Servo Browser Now Supports Tabbed Browsing, WAV Audio Files.
(www.phoronix.com)
This is a most excellent place for technology news and articles.
The language doesn't really matter, the important thing is that it's a new codebase with a focus on memory safety and performance, and Rust helps servo achieve that goal. Gecko is an older codebase, so its focus would be more on compatibility.
Both are open source, servo is mostly exciting because it's a ground-up reimplementation, so it's not shackled by older decisions.